feat(cart): implement cart editing policy with granular permissions

src/app/shared/components/cart/cart.component.ts

@@ -53,9 +53,11 @@ export class CartComponent {
   readonly total = input<number>(0);
   readonly backgroundColor = input<string>('#ffffff');
   readonly readonly = input<boolean>(false);
-  readonly editable = input<boolean>(true);
-  readonly allowEditing = input<boolean>(false);
-  readonly allowRemove = input<boolean>(true);
+  readonly allowUpdateQuantity = input<boolean>(true);
+  readonly allowModify = input<boolean>(true);
+  readonly requireEditingMode = input<boolean>(false);
+  readonly allowUpdateVariant = input<boolean>(true);
+  readonly allowDelete = input<boolean>(true);
   readonly persistQuantityChanges = input<boolean>(true);
   readonly editingDisabled = input<boolean>(false);
   readonly editing = model<boolean>(false);
@@ -125,7 +127,7 @@ export class CartComponent {
   }
 
   protected onItemQuantityChange(index: number, newQuantity: number): void {
-    if (!this.editable()) {
+    if (!this.allowUpdateQuantity()) {
       return;
     }
 
@@ -170,6 +172,8 @@ export class CartComponent {
   }
 
   protected onItemVariantChange(index: number, variantId: number): void {
+    if (this.readonly() || !this.allowUpdateVariant() || this.editingDisabled()) return;
+
     const item = this.items()[index];
     const cartItemId = item?.cartItemId;
 
@@ -200,6 +204,8 @@ export class CartComponent {
   }
 
   protected onItemRemove(index: number): void {
+    if (this.readonly() || !this.allowDelete() || this.editingDisabled()) return;
+
     const target = this.resolveRemoveTarget(index);
 
     if (!target) {
@@ -225,7 +231,7 @@ export class CartComponent {
   protected readonly formattedTotal = computed(() => this.formatCurrency(this.total()));
 
   protected toggleEditing(): void {
-    if (!this.editable() || this.editingDisabled()) {
+    if (!this.allowModify() || this.editingDisabled()) {
       return;
     }